21313026863 has 16 divisors (see below), whose sum is σ = 21848428992. Its totient is φ = 20784384000.

The previous prime is 21313026817. The next prime is 21313026887. The reversal of 21313026863 is 36862031312.

It is a cyclic number.

It is not a de Polignac number, because 21313026863 - 2⁶ = 21313026799 is a prime.

It is a super-2 number, since 2×21313026863² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21373026863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3658493 + ... + 3664313.

It is an arithmetic number, because the mean of its divisors is an integer number (1365526812).

Almost surely, 2^21313026863 is an apocalyptic number.

21313026863 is a deficient number, since it is larger than the sum of its proper divisors (535402129).

21313026863 is a wasteful number, since it uses less digits than its factorization.

21313026863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6386.

The product of its (nonzero) digits is 31104, while the sum is 35.

The spelling of 21313026863 in words is "twenty-one billion, three hundred thirteen million, twenty-six thousand, eight hundred sixty-three".